1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013-2017 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_GFP_H_ 32 #define _LINUX_GFP_H_ 33 34 #include <sys/cdefs.h> 35 #include <sys/types.h> 36 #include <sys/systm.h> 37 #include <sys/malloc.h> 38 39 #include <linux/page.h> 40 41 #include <vm/vm_param.h> 42 #include <vm/vm_object.h> 43 #include <vm/vm_extern.h> 44 #include <vm/vm_kern.h> 45 46 #define __GFP_NOWARN 0 47 #define __GFP_HIGHMEM 0 48 #define __GFP_ZERO M_ZERO 49 #define __GFP_NORETRY 0 50 #define __GFP_RECLAIM 0 51 #define __GFP_RECLAIMABLE 0 52 #define __GFP_RETRY_MAYFAIL 0 53 #define __GFP_MOVABLE 0 54 #define __GFP_COMP 0 55 #define __GFP_KSWAPD_RECLAIM 0 56 57 #define __GFP_IO 0 58 #define __GFP_NO_KSWAPD 0 59 #define __GFP_WAIT M_WAITOK 60 #define __GFP_DMA32 (1U << 24) /* LinuxKPI only */ 61 #if defined(LINUXKPI_VERSION) && LINUXKPI_VERSION == 50000 62 #define __GFP_NOTWIRED (1U << 25) 63 #endif 64 #define __GFP_BITS_SHIFT 25 65 #define __GFP_BITS_MASK ((1 << __GFP_BITS_SHIFT) - 1) 66 #define __GFP_NOFAIL M_WAITOK 67 68 #define GFP_NOWAIT M_NOWAIT 69 #define GFP_ATOMIC (M_NOWAIT | M_USE_RESERVE) 70 #define GFP_KERNEL M_WAITOK 71 #define GFP_USER M_WAITOK 72 #define GFP_HIGHUSER M_WAITOK 73 #define GFP_HIGHUSER_MOVABLE M_WAITOK 74 #define GFP_IOFS M_NOWAIT 75 #define GFP_NOIO M_NOWAIT 76 #define GFP_DMA32 __GFP_DMA32 77 #define GFP_TEMPORARY M_NOWAIT 78 #define GFP_NATIVE_MASK (M_NOWAIT | M_WAITOK | M_USE_RESERVE | M_ZERO) 79 #define GFP_TRANSHUGE 0 80 #define GFP_TRANSHUGE_LIGHT 0 81 82 CTASSERT((__GFP_DMA32 & GFP_NATIVE_MASK) == 0); 83 CTASSERT((__GFP_BITS_MASK & GFP_NATIVE_MASK) == GFP_NATIVE_MASK); 84 85 /* 86 * Resolve a page into a virtual address: 87 * 88 * NOTE: This function only works for pages allocated by the kernel. 89 */ 90 extern void *linux_page_address(struct page *); 91 92 #define page_address(page) linux_page_address(page) 93 94 /* 95 * Page management for unmapped pages: 96 */ 97 extern vm_page_t linux_alloc_pages(gfp_t flags, unsigned int order); 98 extern void linux_free_pages(vm_page_t page, unsigned int order); 99 100 static inline struct page * 101 alloc_page(gfp_t flags) 102 { 103 104 #ifdef __GFP_NOTWIRED 105 flags |= __GFP_NOTWIRED; 106 #endif 107 return (linux_alloc_pages(flags, 0)); 108 } 109 110 static inline struct page * 111 alloc_pages(gfp_t flags, unsigned int order) 112 { 113 114 #ifdef __GFP_NOTWIRED 115 flags |= __GFP_NOTWIRED; 116 #endif 117 return (linux_alloc_pages(flags, order)); 118 } 119 120 static inline struct page * 121 alloc_pages_node(int node_id, gfp_t flags, unsigned int order) 122 { 123 124 #ifdef __GFP_NOTWIRED 125 flags |= __GFP_NOTWIRED; 126 #endif 127 return (linux_alloc_pages(flags, order)); 128 } 129 130 static inline void 131 __free_pages(struct page *page, unsigned int order) 132 { 133 134 linux_free_pages(page, order); 135 } 136 137 static inline void 138 __free_page(struct page *page) 139 { 140 141 linux_free_pages(page, 0); 142 } 143 144 /* 145 * Page management for mapped pages: 146 */ 147 extern vm_offset_t linux_alloc_kmem(gfp_t flags, unsigned int order); 148 extern void linux_free_kmem(vm_offset_t, unsigned int order); 149 150 static inline vm_offset_t 151 get_zeroed_page(gfp_t flags) 152 { 153 154 return (linux_alloc_kmem(flags | __GFP_ZERO, 0)); 155 } 156 157 static inline vm_offset_t 158 __get_free_page(gfp_t flags) 159 { 160 161 return (linux_alloc_kmem(flags, 0)); 162 } 163 164 static inline vm_offset_t 165 __get_free_pages(gfp_t flags, unsigned int order) 166 { 167 168 return (linux_alloc_kmem(flags, order)); 169 } 170 171 static inline void 172 free_pages(uintptr_t addr, unsigned int order) 173 { 174 if (addr == 0) 175 return; 176 177 linux_free_kmem(addr, order); 178 } 179 180 static inline void 181 free_page(uintptr_t addr) 182 { 183 if (addr == 0) 184 return; 185 186 linux_free_kmem(addr, 0); 187 } 188 189 static inline bool 190 gfpflags_allow_blocking(const gfp_t gfp_flags) 191 { 192 return ((gfp_flags & (M_WAITOK | M_NOWAIT)) == M_WAITOK); 193 } 194 195 #define SetPageReserved(page) do { } while (0) /* NOP */ 196 #define ClearPageReserved(page) do { } while (0) /* NOP */ 197 198 #endif /* _LINUX_GFP_H_ */ 199